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- 1. Multiple Choice
One difference between system flowcharts and data flow diagrams is that system flowcharts show conditional logic whereas DFDs don't.
True
False
- 2. Multiple Choice
The highest level of data flow diagrams is the Level One diagram.
True
False
- 3. Multiple Choice
In the data flow diagram (DFD), arrows represent which way the data goes (in or out); these are called...
External entitles
Processes
Data stores
Data flows
- 4. Multiple Choice
In data and process modeling, a(n) ____ model shows what the system must do, regardless of how it will be implemented physically.
operational
physical
logical
relational
- 5. Multiple Choice
In a DFD, the Gane and Sarson symbol for a process is a ____.
rectangle with rounded corners
line with a single or double arrowhead
flat rectangle that is open on the right side and closed on the left side
rectangle, which may be shaded to make it look three-dimensional
- 6. Multiple Choice
In a DFD, the Gane and Sarson symbol for a data flow is a ____.
rectangle with rounded corners
line with a single or double arrowhead
flat rectangle that is open on the right side and closed on the left side
rectangle, which may be shaded to make it look three-dimensional
- 7. Multiple Choice
A spontaneous generation process is a process that has ____.
no input
at least one output and one input, but the output obviously is insufficient to generate the input shown
no output
at least one input and one output, but the input obviously is insufficient to generate the output shown
- 8. Multiple Choice
A black hole process is a process that has ____.
no input
at least one output and one input, but the output obviously is insufficient to generate the input shown
no output
at least one input and one output, but the input obviously is insufficient to generate the output shown
- 9. Multiple Choice
Because diagram 0 is a(n) ____ version of process 0, it shows considerably more detail than a context diagram.
contracted
exploded
condensed
extrapolated
- 10. Multiple Choice
____ is the process of drawing a series of increasingly detailed DFDs, until all functional primitives are identified.
Leveling
Balancing
Indexing
Exploding
- 11. Multiple Choice
____ maintains consistency among DFDs by ensuring that input and output data flows align properly.
Balancing
Indexing
Leveling
Exploding
- 12. Multiple Choice
Using ____, an analyst starts with an overall view, which is a context diagram with a single process symbol, and then the analyst creates diagram 0, which shows more detail.
balancing
indexing
exploding
leveling
- 13. Multiple Choice
Balancing ____.
uses a series of increasingly detailed DFDs to describe an information system
ensures that the input and output data flows of the parent DFD are maintained on the child DFD
uses a series of increasingly sketchy DFDs to describe an information system
ensures that the input and output data flows of the child DFD are maintained on the parent DFD
- 14. Multiple Choice
In a data dictionary, a(n) ____ is the smallest piece of data that has meaning within an information system.
field
index
record
pixel
- 15. Multiple Choice
In a data dictionary, data elements are combined into ____, which are meaningful combinations of data elements that are included in data flows or retained in data stores.
fields
columns
records
decimals
- 16. Multiple Choice
Typical process description tools include all of the following EXCEPT
context diagrams
decision trees
structured English
decision tables
- 17. Multiple Choice
The disadvantage of the four-model approach is ____.
it gives an unclear picture of the current system functions before any modifications or improvements are made
the requirements of a new information system always are different from the current information system
the added time and cost needed to develop a logical and physical model of the current system
too complicated to implement it.
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